Press with plate type frame



All@ l1, 1942- w. ERNST 2,292,827 PRESS WITH PLATE TYPE FRAME l Original' Filed pril 8, 1958 AT1-amers Patented Aug. 11, 1942 PRESS WITH PLATE TYPE FRAME Walter Ernst, Mount Gilead, Ohio, assignor to The Hydraulic Development Corp. Inc., Wilmngton, Del., a corporation of Delaware Original application April 8, 1938, Serial No. 200,964. Divided and this application January 5, 1939, Serial No. 249,483

1 Claim.

This invention relates to presses, and in particular, to frame constructions for presses.

One object of this invention is to provide a press having a frame wherein the head, bed and side members engage one another by means of a plurality of yprojections or lugs.

Another object is to provide a press wherein the head and bed are provided with projections or lugs passing through apertures in plate-like side members so that the thrust of the 4press is transferred to the side members in straight lines longitudinally along the side members, and substantially without transverse thrust components.

Another object is to provide -a vpress having a head and bed which are provided with lugs seated in correspondingly shaped apertures in platelike side members forming the strain elements interconnecting the head and bed, so that the working thrusts are transferred to the plate-like side members in substantially rectilinear directions without oblique or transverse thrust -components. n

This is a division of my copending application, Ser. No. 200,964, filed April 8, 1938.

In the drawing:

Figure l is a front elevation of a press having a frame construction according to one embodiment of the invention.

Figure 2 is a right-hand side elevation of the press shown in Figure 1.

Figure 3 is a horizontal section along the line 3--3 in Figure 2.

Figure 4 is a horizontal section along the line 4-4 in Figure 1.

In general, the press of this invention includes a head and a bed having projecting lugs engaging correspondingly shaped apertures in the side members. rI'hese side members are in the form of heavy steel plates, and receive the thrusts created by the action of the platen of the press. In the present invention these lugs pass entirely through the side plates and thereby transmit the thrusts in longitudinal straight lines to the side members. In this manner oblique thrusts or outward components are eliminated, so that there is no tendency for the side members to bend outwardly or become distorted during the operation of the press. Where the lugs on the head r bed ipass only -partially through the side plates and not entirely through them, an eccentric condition exists -as to the lines of stress so that the end portions of the side yplates tend to be pulled outwardly. In the present construction, however, where the lugs pass entirely through the side plates, the result is a straight pull on the side plates and therefore there is no tendency to distort them.

Referring to the drawing in detail, Figures l and 2 show one embodiment of this invention, employing lan upwardly-acting plunger. The press of Figure 1 consists of a bed III and a head II having lugs or projections I2 and I3, respectively. These lugs engage apertures I4 and I5, respectively, near the lower and upper ends of the frame side members I6. The stresses are transmitted through these connections between the lugs I2 and I3 and the apertures I4 and I5, the parts being nominally held together by the cap screws I L The latter, however, are not depended upon to transmit thrust but merely serve as .connecting members to hold the lparts in assembly. In the press shown in Figures l and 2 the lugs I2 and I3 are disposed substantially in intermediate positions at the ends of the bed I0 and head II.

The bed I0 is provided with a cylinder I8, within which a plunger I9 reciprocates to move a platen 20 secured thereto. The platen 2|) moves upwardly against the head II in order to perform a pressing stroke, and is guided in its reciprocation by side :plates 2| with beveled portions 22 engaging the correspondingly beveled portions 23 Iat the corners of the platen 20 (Figure 4). The side plates 2| are secured by the .cap screws 24 in recesses in the side members I6. Leakage around the main plunger I9 is prevented by means of a conventional gland construction, generally designated 26. The details of the control mechanism of the press form no part of the present invention, and any desired arrangement may be used. The press shown in Figure 1, for example, is Icontrolled as to its direction of action by the lever 21. A hand wheel 28 also enables the total amount of the pressing force to be varied by the operator in a manner well known to those skilled in the art. In this embodiment of the invention, therefore, as the lugs I2 and I3 pass entirely through the apertures I4 and I5 in the side .plates I6, thereby the thrust is applied lcentrally to the side Iplates I6 rather than at the edges thereof.

It will be 4understood that I desire to comprehend within my invention such modifications as come within the scope of the claim and the invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

A vertical press comprising a press head, a press bed, and side members, said side members said vertical side walls above and below said 'projections for the top and bottom, respectively, being entirely in contact with said side members, said head and bed members having portions adjacent said projections bolted to said side members and the bolts being the only securing means for maintaining the head and bed in assembled relation with the side members.

WALTER ERNST. 

